Antiskid device for vehicle wheels



Aug. 15, E939. T. HAMALAINEN 2,169,950

'ANTISKID DEVICE FOR VEHICLE WHEELS Filed o0 24, 1938 2/0 Ham @la z'ez INVENTOR Patented Aug.15, 1939 i UNITED STATES PATENT OFFICE 2,169,950 AN'rlsxn) DEVICE Fon. VEHICLE WHEELS Toi-,vo Hamalainen, Finiayson, Minn. Appuauon october 24, 193s, serian No. 236,746

'i 1 Claim.

The invention relates to an antiskid device for vehicle wheels and more especiallyl to a mud or snow hook for use on vehicle wheels.

'I'he primary object of the invention is the provision of a device of this character, wherein a plurality of hooks can be engaged at differentl points over the tread of a pneumatic tire on the vehicle wheel so that should the wheel tire lose traction he hooks will grab to avoid such traction loss` articularly when a vehicle is traveling upon a muddy surface or in snow.

Another object of the invention is the provision of a device of this character, wherein the plurality of hooks are assembled for adjustment so that 5 the same can be applied to tired vehicle wheels of different sizes and when worn 'thereon will enable the wheel tire to have a firm tread. for avoiding sticking in snow or mud, the device being of novel construction and may be conveniently' adjusted for the mounting or fastening of the same upon a tired wheel or the like.

` A further object of the invention is the provision of a device of this character, wherein the same, when mounted upon a tired wheel, wlllbe secure toavoid accidental removal thereof and willenable rm or positive traction of the tired wheel, particularly when traveling over a slippery surface.

A further object of the invention is the provi- 30 sion of a device of this character, which is simple in its construction, thoroughlyv reliable and efficient in operation, susceptible of convenient mounting on and removal from a tired vehicle wheel, and in the wearing thereof "will assure positive traction of such wheel on slippery surfaces, eliminatingthe necessity of jacking the Wheel or otherwise raising the same for the ao,- plicatlon of the device, strong, durable, and inexpensive to manufacture.

With 4these and other objects in view; the invention consists in the features of construction. combination and arrangement of parts as will be hereinafter more fully described, illustratedV in 45 the accompanying drawing, yWhichdiscloses the preferred embodiment of the invention and pointed out in the claim hereunto appended.

In the accompanying drawing: Figure 1 is la side elevation of a tired wheel 50 showing the deviceconstructed in accordance with the invention applied thereto.

Figure 2 is an enlarged fragmentary. sectional View taken on the line 2-2 of Figure 1 looking in the direction of the arrows. y

Figure 3 is a sectional view taken on the line arrows.

" teeth 22.

3--3 of Figure 1 looking in the direction of the Figure 4 is a side ele'vation of a tool for service in the mounting o the device.

Figure 5 isa fragmentary plan view of such tool.

Similar reference characters indicate corre sponding parts throughout the several views in the drawing. f

Referring tothe drawing in detail, A designates generally the wheel proper, being of standard construction, and B the tire worn thereby, which is of conventional pneumatic type, while C denotes generally the device constituting the present invention and hereinafter fully described. f

The device C comprises asubstantially hexagonal shaped frame Hl, preferably fiat faced at opposite sides thereof, and at the outer flat side of such frame, preferably at three points thereof are .guides Il, being uniformly spaced from/each other at the three-point locations thereof, and each has associated therewith spaced outwardly directed pivot ears l2 while within such guides is a guideway i3 for a slide arm l having built therein at the outer side inset rack teeth iselectively engageable by a spring-pressed latching dog or ratchet latch i6, its spring being indicated at l'l, for urging the dog or latch I8 into Vengagement with a rack tooth i5 and in this manner the arm it is latched or held fast against sliding movement in one -direction the dog or latch l5 being swingable on a pivot i8 mounted in the pivot ears l2 and such dog or latch is located between these spaced ears l2. The dog or latch i6 is'manually releasable for the freeing of the arm M for sliding movement in its companion guide Il.

Adjustably fitted with each arm IB is a hook i9 having a. flange-like gripping rib or lug 20 for biting into mud or in s'now covering a surface over which the vehicle Wheel A travels and assures a rm tread to the tire B of said wheel A. The flange rib or lug 20 is partially longitudinally extended with a stem 2l of the hook i9 and this extended portion is formed with rack The extended rib or lug 20 with the teeth 22 passes through a clearance slot 23 provided in the arm M and coincident with the said slot 23 is a latching lip 2d, being extended from an outwardlycurled end of the said arm It and such lip 24 selectively engages a tooth 22 so thatthe hook I9 withthe'stem 2| can be locked against relative movement to the arm M. The stem 2i of the hook I9 is fitted with a bolt 26 carrying a nut 21 and such bolt movably ts within a slot 28 therefor provided in the arm I4. Now on the tightening of the bolt 26 by its nut 21, the stem 2l and such ann I4 will be fastened together and in this manner the said hook I9 is adjusted on the arm I4.

In this instance there are three hooks I9. these being located at three points circumferentially of the tire B of the vehicle wheel A and when the device is wom by the wheel, it will assure positive traction action to the wheel, the hooks being employed for tting to the wheel to avoid traction loss when a wheel is traveling over a muddy surface or in snow.

By reason of the arrangement of the hooks I9, these being uniformly spaced from each other at the outer periphery of the tire B of thewheel A, assures against skidding when worni by the Wheel.

In Figures 4 and 5 of the there is shown a tool adaptable for use in adjusting the hooks I9 with relation to the frame I0 on the application of the device to a tired wheel and the clamping of such device thereon. The tool comprises a handle bar 29 made fast to a. fork 30 having journaled transversely therein a roller 3| while pivoted adjacent to the fork 30 is a fulcruming hook 32 which is adapted to cooperate with the roller 3| on the applying of the tool so that adjustment of each hook I9 can be had. These hooks I 9 in the series are drawn tightly against the tread of the tire B and such drawing being had by the use of the tool just described in that the stems I5 of said hooks will be slidably forced inwardly of the wheel A and the arms I4 rendered adjustable will become latched thus holding the hooks I9 securely engaged with the tire B of the wheel A for the wearing of the device thereon without accidental detachment.

Of course, it is understood that the tool hereinbefore described may be used for the releasing of a hook or hooks when it is desired to remove or detach the device from the wheel.

The device when worn upon the Wheel will prevent skidding thereof and also the loss of traction at the tread of the tire B, particularly when traveling through mud or in snow.

What is claimed is:

A device of the character described comprising a central member, arms slidably fitted with and extending radially from said member, means for latching the arms in adjusted positions, treadengaging hook members adjustably connected with said arms, guides carried by the said central member and having the arms slidably fitted f therein, means associated with said guides for latching engagement with said arms, rack teeth formed in said arms and selectively engageable by said last-named means, teeth formed on the hook members, and lips on said arms for selectively engaging the teeth on the hook members.

TOIVO HAMALAINEN. 

